Figure 4: Mean expression data showing distribution of luminal, basal and ERBB2 markers in the various subtypes of breast cancer. Parametric comparison of mean expression of luminal (green) and basal (blue) in ER/PgR positive (n=16), HER2-enriched and TNBC (n=14) patients. The normalized expression value of ERBB2 (gold) in the various subtypes of breast cancer in the same patient samples is also shown. The average expression of basal and luminal markers is exclusively overexpressed in TNBC and significantly overexpressed in ER/PgR cases respectively (independent sample t-test p-value <0.003).